Awhite dwarf, a dense dead star, burns through its hydrogen before it can grow into a supernova. identify the nonessential appositive phrase. a white dwarf a dense dead star hydrogen supernova

To me I think the answer is the phrase “a dense star”. Although it may sound silly, the phrase “a dwarf star” is relevant because it explains what it starts out as. “Hydrogen” is important because it describes how the change occurs. The phrase “supernova” explains what it turns into. All of these frases except for “a dense dead star”, the description of what a dwarf star is, are relavent to the passage.

Is this the whole problem or

Is this english or something else